Pump-packing means



April 10,1928; l l i,s65,4s9

A. HCLLANDER ET AL PUMP PACKING MEANS Filed M ay s. 192e Patented Apr. 10, 1928.

UNITED STATES PATENT OFFICE.

ALAiJAR HOLLANDER, or BERKELEY, AND WALTER L. FORWARD, oF oAKLANn, CALI- roRNIA, AssIGNons ro BYRON JACKSON PUMP Mrs.. co., or BERKELEY, CALI- FORNIA, A CORPORATION 0F CALIFORNIA.

PUMP-PACKING MEANS.

Application filed May 3,

Our invention has for ,its principal object the maintenance of the eHicient lubrication of pumps and especially in deep well pumps.

A further object is the automatic main,

tenance of packing between the lubricating compartment and an outlet and between a pressure chamber and anout-let.

A further object is preventing the leakage of pressure-discharge water into the shaft and bearing compartment.

Other objects will appear from the drawing and specifications.i

These objects we accomplish. by providing around the pump shaft a suitable tubular shield having a discharge duct in its bottom portion and just above the said discharge duct we introduce packing to prevent the excessive loss of oil which would otherwise occur after passing by the bearings. Such oii as has been expended works its way slowly .through the packing and is discharged through the said duct. This action was prevented in pumps heretofore lby the back pressure from the pumped fluid compartment.

Below the said duct and between thetubular shield and the shaft we introduce a second packing and below Vthis latter packing we prefer to introduce a cup leather or equivalentl form of piston against which fluid pressure is admitted. Such water as leaks into or is admitted into the lower end ef the shaft tube establishes a pressurev against the cup leather and expands the same. The cup leather and its associated parts thus acts as a piston and provides a tight joint and a compression of the packing thereabove. This compression is at all times automatically maintained.

By the combination of the packing and the cup leather as describech the high pres'- sure water which flows or leaks in from the impeller compartment is efectually sealed from rising into the space between the tubu- 1926. Serial No. 106,342.

lar shield and the shaft, and by the first, mentioned packino' the olisl retained between the tube and the shaft with the bear- 'In'gsproperly lubricated at all times.

Because of the discharge duct between the two packings no back pressure can be established against the oil, hence the oil cannot be displaced and perfect lubrication isautomatically retained at 'all times.

lin apparatus of this type heretofore the leakage of pressure water upwards between the shield and the shaft has resulted in forcing out the lubricant, except where special lubricating connections and a separate and counter pressure against the lubricantwere provided, an expensive and unsatisfactory structure.

By our method a proper lubrication is at all times effected and at'the same time pressure water is kept away from the shaft compartment.

ReferringV to the accompanying drawing by which our invention will be made clear.

F ig. l is a fragmentary cross section through the lowerend of a vertical shaft high speed centrifugal pump employing our invention.

Fig. -2 is a section through va well employing a pump having the construction of Fig. l at its lower end.

Fig. 3 is a fragmentary cross section of an.

alternate forml of cup leather packing.

lilig. l is a cross section on the line lQV-ll of lig. l.

Throughout the figures similar numerals refer to identical parts.

lhe numeral l indicates a pump casing, on the lower end of which we prefer to introduce a casting having ducts 3, et extending from the tubular portion 5 through the water channel 6, and therefore sealed from pressure water and free to discharge an pressure Jfluid and any lubricant that leaks by the paclrings.

rlhese ducts are preferably formed in the ribs one of which is shown at Z (see Fig. 4).

'At 8 is a main pump shaft and at 9 an impeller fixed on'the said shaft.

rlhe impeller rotates in the impeller compartment 10, having the guide channel 1l for delivering discharge water from the impeller 9 and into the pump column 6.

The tubular shield for the shaft is indicated at 12 and his its extended portion formed by the casting 5 and therebetween is mounted a bearing 13 of which there are usually a shaft 8 an the tube 12, in spaced relation and to take care of the proper supporting of the long shaft ordinarily -employed in apparatus of this character.

'Below the bearing 14' is' the oil packing 15 held in place by the cage 16` an therebelow a second set of packing rings 17 which in turn are held in place by the telement 18, cup leather 20, and ring member 19 threaded to the collar 19 and thereby gripping the leather 20 and forming collectively piston means.

Thisgland in effect clamps all of the parts between .the lower end of the tubey 5 and bearing 13.l The element 18 holds'in place the cup leather piston and which under the action of fluid pressure fromI below seals against the inner portion of the tube 5, the element 18 being threaded into the said tube to hold the parts in position at such times as no fluidy pressure is exerted upward against the piston 20, ,as when the .parts are assembled and shipped and before putting 1n use.

It will now be seen that lubricant which is freely supplied from the top of the pump and which flows down through the bearing compartment 21 is held in place by the acking material 15 and any leakage t roug the said packing flows freely out through the ducts 3 or 4, there being no Vpossible back .pressure against the lubricant column, due

to fluid pressures of the pump.

On the other hand fluid pressure leaking or passing from the passages 11 around the shaft 8 and element 18 is stopped by the packing material 17 which bears tightly aga-inst the column shaft 8 and is held compressed thereagainst by the piston 20.

Leakage along the outside of the packing 17 -and between it and the tube 5 is pre- `vented or reducedto a minimum by the cup pressures.

leather 20.

The degree of compression in the packings 15 and 17 is automatically controlled and determined b the Idischarge pressure of the pump exerte this pressure is automaticall attained being higher or lower respective y as Vthe ump is employed on higher or lower disc arge thAny excess leakage of pressure fluid by e packing 15 Iis discharged through the ducts 3, 4. The pressure water leaking into the space 22 seals the cup leather 2O against the inner surface of the tube 5.

In the alternate construction shown inV Fig. 3 the cup leather 30 seals against the' (plurality arranged between the e against the vpiston 20 and by said piston against the said packings, and

lpacking 17 and any excess oil escaping" such case the 1packing 17 may be reduced orl dispensed wit 'lhe small leakage that does occur by the cup leather 20 and packing 17 passes out throufvh the ducts 3 or 4 as does alsothe expentded lubricant which may seep down through the packing at 15.

It will now be seen that no can occur against thelubricant or in the lubricating compartment, that the high pressure water is sealed against etting into the lubricating compartment anc that all parts are automatically retained in proper 'lubricated condition durin 'operation'.

applied to a deep wcll centrifugal pump for back pressure v Although we have siown our invention as advantageous, it may also `be, employed 1n horizontal and other forms of fluid pressure y apparatus as hydraulic turbines and the like and we wish to be understood as claiming all such.

We claim:

1. Means for maintaining lthe lubrication of fluid pumps having impeller shaft and bearing means, and comprisin a tubular shield surrounding yand space from said shaft, said bearing means positioned between said shield and said shaft, a discharge duct from said shield adapted to discharge excess fluid or excess-lubricant from; the space be-V tween the shaft and the shield, means between the duct and the means and other packing means between the duct and the 4impeller means, said first named packing y'meansiadapted to restrain the escape of lubricant through the ductland said other packing means adapted tilrestrain the escape of pressure fluid through'` the duct, and a piston adapted to automatically compress both packings simultaneously vand actuated by discharge pressure of said pump, and aspacling cage between said packing and said other acking.

2. In a eep well pump, a -wellcasing, a shaft in said casing, a tubular shield around said shaft and providing a channel for dischargedwater between' the shield and the casing, limpeller means on the lower end of said shaft, a duct across 'said channel adapted to discharge to the exterior ofthe casing and having an inlet ortI into the tubular shield, packing material between the shaft and the shield above said inlet port, a piston means between said port and said impeller means'and between said shield and said shaft and a passage adapted to'communicate pressure fluid from the pump dischar e against the piston means to compress sai packing.

3. -In a deep well pump, a well casing, a-

shaft in said casing, a tubular shield around said shaft and roviding a channel for dis` acking caring los said shaft, a duct across saidv channel adapted to discharge to the exterior of the casing and 'having an inlet port into the tubular shield, a cage between the shaft and the shield opposite saidport, packing material above and other packing material below said cage, and a cup leather piston between said port and said impeller means and between said shield and said shaft which sealslpressure fluid from passing upward between the shaft and the shield.

4. Means for maintaining the. lubrication of a deep well Vertical shaft pump having shaft bearings, comprising a tubular shield low said discharge duct and sealing the space between the shaft and the shield from ingress of pressure fluid, and comprising a piston below said last named packing adapted to compresssaid packing and said cage and a passage adapted to communicate pressure iud from the pump discharge against the piston to compress said packing.

ALADAR HOLLANDER. WALTER L. FORWARD. 

